Add the possibility to have a tool or integrate in the DIV tool the ability to include the basics semantic element tags given by HTML5

It can be a new tool or integrate to the DIV tool
I was thinking of the basic tags like: <header>, <nav>, <main>, <section>, <article>, <footer>...

With you Microdata tool it will give great SEO power in building content in JCE, I think?

Great, now the only thing missing is the ability to drag and move all the block element